Oven.



D. J. MONAHAN.

OVEN. APPLICATION IILED'AUG M, 1912.

Patented June 16, 1914.

UNITED STATES PATENT OFFICE.

DANIEL J. MONAI-IAN, OF ERIE, PENNSYLVANIA, ASSIGNOR TO GRISWOLD MANUFAC- TUBING- GOMPANY, 0F ERIE, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

OVEN.

Specification of Letters Patent. Patented June 16, 1914:.

Application filed August 14, 1912. Serial No. 715,023.

To all whom it may concern:

Be it known that I DANIEL J. MONAHAN, a citizen of the United States, residingat Erie, in the county of Erie anduState of Pennsylvania, have invented new and useful Improvements in Ovens, of which the following is a specification.

This invention relates to ovens and consists in certain improvements in the construction thereof as will be hereinafter fully described and pointed out in the claims.

More particularly the invention relates to that type of ovens ordinarily used with hotplates, especially such ovens as are so arranged with relation to the gas burner that the products of combustion are delivered directly into the oven. 7

The invention is illustrated in the accompanying drawings as follows Figure 1 shows a perspective view of the oven, the door being open. Fig. 2 an enlarged view of one of the upper corners of the door opening. Fig. 3 an enlarged view of a portion of the door showing the door construction. Fig. 41 an end view-of the bottom of the door showing the hinge construction.

1 marks the bottom of the oven. This has the usual opening 2. It will be understood that the oven is ordinarily placed upon a hot-plate and that the burner is directly below or within the opening 2. 3 marks the end walls, 4 the top and 5 the rear wall. These are formed of sheet metal. Inasmuch as these ovens are ordinarily only temporarily in place, lightness of construction is desirable in order that they may be readily removed and put in place on the hot-plate or stove. Immediately below the door opening in the front of the oven there is a base piece 6 which extends across the front of the oven. The door 7 is hinged directly above the base piece 6 and is of a size to close the opening.

I-Ieretofore in stove construction it has been common to make the closure between the oven door and the face of the oven walls by having the inner face of the door in contact with the outer face of the wall. While with cast structures which are rigid this is more or less satisfactory nevertheless in all cases there is sufficient leakage to interfere with the efficiency of the oven. In the present invention, the side walls and top wall are bent inwardly forming a face 8. A

rabbet is formed within the door space, the rabbet having the edge face 9 and door face 10. A flange 1O extends inwardly from the face 10 and an upright column 11 of channel form is arranged back of the face 10' and under the flange 10. This column is closed at the side by the wall of the oven and this structure forms an air space 13 within the column 11. An opening 15 is arranged in the top of the column 11 and forms a means of communication between the interior of the oven and-the space 13. An opening 16 is arranged at the bottom of the column and in the wall 3 and forms a means of communication between the space 13 and the outer air. Columns 17 are arranged at the rear of the oven and these are provided with perforations 15 at the top similar to the perforation 15 and perforations 18 at the bottom similar to the perforations 16.

Where ovens are used as these ovens are so as to receive directly the products of combustion some means must be provided for the escape ofthese products otherwise the accumulation of such products would interfere with the combustion at the burner. In this structure, the columns 11 not only form a backing for the rabbet along the edge of the door opening for receiving'the door but also form an eflicient means for the outward passage of the products of combustion, taking them from the top of the oven and de livering them to the atmosphere at the bottom of the column. These columns also form a support for the bars or guides 22 for the sliding racks 28 which are commonly used in these ovens. This is an important feature especially with sheet metal walls in that these columns by reason of their angular. structure especially at the front and back are of sufiicient rigidity to sustain the weight placed on the racks such as the rack 28. The deflector plate 24 is secured in the lower channel of the lower guide plate 22 by means of the wire hooks 24?.

In the structure shown the guides and columns are secured together and these parts so assembled are slipped into place in the oven, the flange 10 holding the front column against the wall and engagement of the rear column with the rear wall of the oven holding the rear column in place. It will be observed that while the columns take care of the circulation circular cooking utensils can be placed on the racks and will extend between the columns to the side walls. In this way .the capacity of the oven for such utensils is determined by the full distance between the side walls.

The door 7 is preferably formed of sheet metal. In .order to stiffen the edges of the door so that it will make a reasonably close seal with the door face 10, I have provided the edge of the door with rolled edges having the rolls 7*. The top is provided with a roll 7 the top roll extending against the end of the side rolls. The bottom roll 7 extends across the bottom of the door and slightly beyond the end of the door forming v a pintle 7 d for the hinge of the door. These rolls are preferably of a'diameter approximating the depth of the rabbet, or in other Words the width of the surface or edge face 9 of the rabbet, and the rolled edge as it contacts the surfaces of the rabbet leaves an air perforation 20 in the face 10, and extends space in the corner sealed by the door. This adds to its efiiciency in preventing leakage.

The bottom plate 6 is bent inwardly at its top forming a base 6 of a rabbet for the over the pintle 7 and is secured to the base plate 6 by a rivet 21. In this way a smooth working hinge is cheaply provided.

In order to insulate the door and also increase its rigidity I strike up a panel 25 in the face of the door, thus improving the finish of the outer face of the door and with a panel 26 within the door forming an air space 27 between the panel 25 and 26. This panel, therefore, insulates the door and at the same time gives to the door suflicient rigidity to act as a platform on which the material may be set in taking from 'or placing it in the oven. held When open by the Wire link 28, one end being secured to the column 11 and the other to the door said link having an intermediate joint or hinge.

l/Vhat I claim as new is,:

1. In'an oven, the combination of sheet metal walls having a door opening in the front with a base plate having a rabbeted top bent in the base plate, said rabbeted top forming a base for the door; and a door hinged to roll on said rabbeted face.

2. In an oven, the combination of walls having a door opening in the front, said door opening being rabbeted along the edge; and a door with a rolled edge, the diameter of the roll approximating the depth of the rabbeted edge and fitting into the rabbeted edge as the door is closed, said roll forming I The door is normally an air pocket closed by the lines of contact between itself and the surfaces of the rabbet. 3. In an oven, the combination of walls having a door opening in the front, sald door opening being rabbeted along the edge;

said extension forming a pintle for the hinge; and means acting on said extension for hinging the door in the door opening.

4:. In an oven, the combination of walls having a door opening; a door arranged in said opening, said door having a rolled edge, the roll extending in an axial direction beyond the body of the door, said extension forming a pintle for the hinge; and means acting on said extension for hinging the door in the door opening.

5. In an oven, the combination of sheet metal walls having a front door opening having a rabbeted face formed around said opening, the rabbeted face at the side being formed by bending the metal forming the side walls, the rabbeted portion of the opening at the bottom being formed in a base plate and forming a seat for the door; a door for said opening having rolled edges adapted to seat in the rabbeted portions of the walls surrounding the opening, the roll of the door approximating in diameter the depth of the rabbet, the roll of one edge extending in an axial direction beyond the door body, said extension forming a pintle for the hinge; and means acting 011 said extension for hinging the door in the door opening.

6. In an oven, the combination of sheet metal walls having a front door opening with a rabbeted face formed around said opening, the rabbeted face at the side being formed by bending the metal forming the side walls, the rabbeted portion of the opening at the bottom being formed in a base plate and forming a seat for the door; a door for said opening having rolled edges adapted to seat in the rabbeted portions of the walls surrounding the opening, the roll of the door approximating in diameter the depth of the rabbet, the roll of one edge extending in an axial direction beyond the door body, said extension forming a pintle for the hinge; and a strap extending around the extension in the face of the rabbet and secured to the face of the oven wall.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

DANIEL J. MONAHAN. Witnesses B. M. I'IARTMAN, H. C. Lonn.

.Oopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

